What I meant is that it's a step backward for what I saw as the trend toward a world in which the power to create things is more evenly distributed.
Don't get me wrong, I have a kindle, and I love it. But it's not just optimized for reading, it's optimized for reading content that's distributed through a centrally maintained distribution channel. (And while Amazon is trying to wrest control of that channel from the traditional publishers, it's a transfer of power from one central authority to another.) Which is why I appreciate tools like Readability's 'send to kindle' bookmarklet so much: it lets me read content from the bazaar more easily. But. Even then, I had to jump through hoops and the formatting isn't great. In short, it's not optimized.
Furthermore, while on the web on a PC I can read a blog post and then immediately comment, share, or respond in a blog post of my own, on my kindle I can't do any of that. I have to put my own system in place to even remember to do it later. In other words, the Kindle optimizes my consumption experience at the expense of my production experience in a way that's sort of profound in a way that I acutely feel is a step backward.